Water is necessary for carrying nutrients to your cells, flushing bacteria from your system, preventing dehydration, and replacing fluids lost from sweating, but you may not need to drink as much as you thought.
Stephen R. Daniels. pediatrician. No. You shouldn't give your newborn water or sugar water. And if you're feeding powdered or concentrated formula to your baby, never dilute it with more than the amount of water called for on the label. Your infant will get all the necessary hydration from breast milk or formula.
In general, your baby shouldnât drink water until he's about 6 months old. Until then, he gets all the hydration he needs from breast milk or formula, even in hot weather. Once your baby is 6 months old, it's okay to give him sips of water when he's thirsty. Don't overdo it, though, or you might give him a tummy ache or make him too full to eat well. After his first birthday, when your baby's eating solids and drinking whole milk, you can let him drink as much water as he likes.